Collaborative translation infrastructure?

[OriolAbril]

It might be helpful to integrate with some service for collaborative translations like crowdin or transifex, or to avoid that and recommend translating locally and submitting PRs with the translations (like #13 did). I don't have much experience with this, so any feedback is extremely welcome.

It would also be useful to add some CI/pre-commit checks. For example, to ensure if a file is renamed, the corresponding .po files with its translations are renamed too. Or to run gettext and sphinx-intl if new files are added.

[kamila-NF]

Currently, we don't have that type of skills in NF, so collaboration with external organizations would be great.